Adolphus isidor rath



UNITED. STATES PATENT O FICE,

ADOLPHUS ISIDOR RATH, on HYDE, ENGLAND.

MANUFACTURE OF INDIAPRUBBER.

SPECIFICATION forming part of Letters Patent No. 468,627, dated February 9, 1892 7 Application filed July 24, 1891. Serial No. 400,541- (No specimens.) Patented in England June 20, 1891, No. 10,524.

To all whom it may conicrn: tic qualities of india-rnbber are required to 45 Be itknown that I, ADOLPHUS ISIDOR RATH, be combined with increased resiliency, tougha subject of the Queen of Great Britain and 'ness, strength, and durability. Ireland, and residing at Hyde, in the county For the purposes of my invention I take' of Chester, England, have invented an Imwaste silk and I grind it by means of gritfdprovement in the Manufacture of India-Rnbing-rollers or otherwise into a state of dust or 50 ber,"(for which I have applied for British patfind consisting of extremely short fibers, or I cut, dated June 20, 1891, N 0. 10,524,) ofwhich reduce the silk waste to a like condition by the following is a specification. cutting or other available or known means The object of this invention is to impart to which will produce the same effect, and add india-rubber during the process of its manua proportion of this silk waste so ground, re-. 5 5' facture greatertoughness, strength, and duraduced, or cut to the dough of india-rubber, bility, whereby iTSL'VETlH'B is increased, its and work'it well into the dough with the sulqualities improved, and it is rendered espe- .phur and other usual ingredient in the ordi cially applicable to a variety of useful purnary mixing-machine until it is thoroughly poses to which india rubber. prepared or incorporated with the rubber and evenly dis-to possessing these qualities only'in a modified The quantity of silk waste required to give degree is not so advantageously applicable. the requisite qualities to the rubber'will vary- Myinvention consists, mainly, in imparting according to the purpose for which the ma these desirable qualities to the india-rubber terial is to be used and to the treatment to 65 by the admixture therewith during-the'prowhich it is to undergo; but, for example, I cess of its manufacture and whilein the state may say that for making tn bular or solid tires known as dough of a small proportion'of for cycles about six ounces of silk to twenty: fiber of waste silk, as hereinafter described, eight pounds of rubber will be found to bea which will be found to impart a strength, suitable proportion, while for covering pneu- 7c resi1iency, toughness, and durability to the matic tires or for making the treads of india-rubbe'r which it would not otherwise noiseless tires for cabs or other carriages, possess. i g which are subject to an increased' amount of India-rubber manufactured according to wear and tear, a proportionately increased my invention is especially suitable for thev amount of the si k might be employed with 75 g I protecting covering of the india-rubber tubnadvantage to the samequautity of .rubber. hr the known asaip neumaticw-tires and Ifclaixn-as my inventionv applied to the wheelsofbicycles and other The herein-described composition of mat-1 velocipedes, Itis-alsoapplicable' tctjthemanu- 'ter, consisting of indi'a rubber mixed-with facture ofwhat are'known asivcushion-tires finelyd ed flkfib increased, strength andjdurability, as well 'as name to this specification in. the presence f on account of itspeculiar nonsli'lipingqualim two: subscribingwitnesses; whereby the sidelslipping of the wheel is-preand solid tiresused forcycles, owing to its}- In testimony whereof I have signediny' vented. It-isalso particularly' applicable to what are'knownas "noiseless tires for'cabs' :Wmnesseez 1 v and other vehicles, and for an almost endless I i, ,QHABLES niv iafg 

